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-RAMAGE <br /> ENVIRONMENTAL Sacramento Office <br /> Post Office Box 869 <br /> Rancho Murieta, CA 95683 <br /> Tel (916) 354-3250 <br /> May 17, 1999 Fax (916) 354-1786 <br /> RFrEIVED <br /> Ms.Lori Duncan, R.E.H.S. <br /> F San Joaquin County PHS/EHD MAY 2 0 1999 <br /> :304 East.Weber Avenue, Third Floor ENVIRONI\AENTAL_ HEALTH <br /> =;Post Office Box 3$$ PERMIT ] SERVICES <br /> Stockton, CA 95201-0388 ' <br /> Re:. Confirmation of Telephone Conversation <br /> San Joaquin County Agricultural Commissioner's Office <br /> 503 East 10th Street, Tracy, California <br /> PHS/EHD Site Code: 1793 <br /> Dear Ms. Duncan: <br /> It"was a pleasure to speak with you on Wednesday May 12, 1999 regarding the above- <br /> referenced" ro ect. <br /> A's we discussed,based on the two rounds of quarterly groundwater sampling from the three <br /> Wells, additional quarterly groundwater monitoring and sampling will be discontinued. <br /> Instead, the existing"soil and groundwater-grab sample data will be used to prepare a mass <br /> balance calculation to estimate the residual contamination in the former tank pit area. <br /> Thank you for your assistance on this project. Ramage Environmental has begun to prepare <br /> the mass balance calculation for submittal to PHS/EHD. If you have questions or need any <br /> additional information, please call me at(916) 354-3250. <br /> 'p-Sincerely, <br /> RAMAGE ENVIRONMENTAL <br /> c. 4 <br /> f <br /> :. Joseph Ramage, R.G. <br /> 4Project Manager <br /> t Y CC: Mr. Bob McMillen—San Joaquin County Facilities Management <br /> r Mr. Mark List—Central Valley Regional Water Quality Control Board <br /> , <br />